Samarskite

Part of speech: noun

Definitions

1. A distinctive and uncommon mineral that is mainly made of uranium and includes rare-earth elements, typically located in granitic pegmatite formations
2. This mineral, often appearing in shades ranging from black to brown, is primarily composed of uranium and contains thorium and niobium, making it important for geochemical research
3. A unique mineral that occurs predominantly in granitic pegmatites and consists of uranium along with rare earth elements such as thorium and niobium

Etymology: Samarskite is named for a person, not a place or a process: Vasilii Evgrafovich Samarsky-Bykhovets, a Russian mining official in the Ural Mountains, who was the owner of the specimen's source. The mineral was named after him in 1847, and the name has since been applied to a whole family of uranium-bearing minerals with similar chemistry. The name works like many mineral names that honour a collector or official. The suffix "-ite" is the conventional ending for minerals, while the root "Samarsk-" comes from the Russian surname, so the word is a plain personal-name coinage rather than a descriptive term drawn from Greek or Latin. Its meaning in everyday use has never shifted: it simply points to the material that Samarsky-Bykhovets's name was attached to.